The OEPrepareDepiction function now throws a warning in cases
when 2D coordinates are generated that are inconsistent with the cis/trans bond stereo
configuration of the molecule.

OEPrepareAlignedDepiction can now handle
molecules with more than 32 rotatable bonds. Previously, if the
number of rotatable bonds was greater than 32, not enough sampling
would be done to achieve a good alignment. Additionally, the set of
bonds to rotate is decided in a dynamic fashion to mitigate the expense
of fitting large flexible molecules.